• 试题 ID 14022


已知集合 $M=\{x \mid-4 < x \leqslant 1\}, N=\{x \mid-1 < x < 3\}$, 则 $M \cup N=$
A $\{x \mid-4 < x < 3\}$
B $\{x \mid-1 < x \leq 1\}$
C $\{0,1,2\}$
D $\{x \mid-1 < x < 4\}$
E
F
答案:

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解析:

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